20117548145633 has 4 divisors (see below), whose sum is σ = 20120579272980. Its totient is φ = 20114517018288.

The previous prime is 20117548145623. The next prime is 20117548145677. The reversal of 20117548145633 is 33654184571102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3148981564369 + 16968566581264 = 1774537^2 + 4119292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20117548145633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20117548145603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515553718 + ... + 1515566991.

It is an arithmetic number, because the mean of its divisors is an integer number (5030144818245).

Almost surely, 2^{20117548145633} is an apocalyptic number.

It is an amenable number.

20117548145633 is a deficient number, since it is larger than the sum of its proper divisors (3031127347).

20117548145633 is an equidigital number, since it uses as much as digits as its factorization.

20117548145633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031127346.

The product of its (nonzero) digits is 2419200, while the sum is 50.

The spelling of 20117548145633 in words is "twenty trillion, one hundred seventeen billion, five hundred forty-eight million, one hundred forty-five thousand, six hundred thirty-three".